Carbureter.



UNDERWOOD & R. S. HILL, GARBURBTER, f

APPLICATION FILED AUG. 29, 1910A 1,033,180. famme@ July 23,1912. i

I l y E y n L @Jwfwmw UMTED STATES rinrrnivr OFFICE;

OLIVER P. .-UNDRWOOD AND RAYMOND S. HILL, OF DIESY MOIES, IOWA; SAID UDER- WOOD A SSIGNOR TO HERMAN C. MILLS, OF DES MOINES, IOWA.

CARBURETER.

Specification of Letters Patent.

Patenteilliuly 23,

To all whom it mag/'convenir Be it known that we, OLivEu P. UNDER- woon and RAYMOND S, HILL, citizens of the United States, residing at Des Moines, in the county of Polk and State of Iowa, have invented a certain new and useful Carbureter, of which the following is a specification.v

This invention relates to that class of carbureters in whiclia gasolene distributing tube is provided within the carbureter chamber and the gasolene or other liquid fuel' is discharged through said distributing tube into a current of air which vaporizes the gasolene and delivers it to an internal combustion engine or the like. In carbureters of this class it isdesirable that the gasolene be maintained ata certain predetermined level below the discharge end of said discharge tube and that itI be drawn from the discharge tube by the suction of air.

0ur`object is to provide means whereby the gasolene may be freely fed tto t-he dis-- charge end of the distributing tube and normally maintained at a certain predeter- Y mined-level below the upper end of said discharge tube regardless of ,the amountv of pressure upon the gasolenei being delivered to the discharge tube.

More specifically it is our object to provide means whereby the level of the gasolene relative to the discharge end of the tube may be readily and quickly adjusted by the op-` erator so that the gasolene is close to the discharge end of the tube or at a point a considerable distance below it to meet the various requirementsA of use.,

A further object is to'provide a carbure' ter of this classl of simple, durable and in expensive construction that ,will not be injuriously affected byv violent shaking or jarring applied to it as is the case when car.

ureters are used on devices` like automobiles. Our invent-ion consists in certain details,

in the construction, arrangement., and cornbination of the various parts of the device, whereby the objects contemplated are at'- tained, as hereinafter more fully set forth, 'pointed out in our claims and illustrated 1n therewith, and Fig; shows a detail, sectional view through the carbureter chamber taken on a line at right angles to that on which Fig. 1 is taken. y y

Referring to the accompanying drawings, we have used the'reference numeral 10 to indicate the hollow body portion of the carbureter. At its top is a pipe 11 containing a throttle valve 12 for controlling the l'low of mixed air and gasolene from the carbureter. At the bottom of thecarbureter chamber is a perforated bottom plate 13 having an opening a't-'its center-to form a bearing for the distributing .tube hereinafter described.

Formed integral with one side of the carbureter chamber is a cylindrical chamber 14 having at its bottom'a pet cock 15 and having an opening 16 at its top:` This cylindricall chamber 14 is provided with a discharge passagewayat 17 and on its side opposite from the passageway 17 is a'fuel feeding passageway 1'8. Formed integral with the side of the cylindrical chamber v14 is a. second cylindrical chamber 19 having a vert-ically arranged opening 20 extending from its top to a point spaced apart from its bottom and leading into' a large recess 21, which recess communicates with the passageway 18.. Formed in the cylindrical chamber 19 surrounding the opening 20 is a cylindrical recess 22 spaced apartfromA` the cylindrical opening 20 by .the tubular wall 23. A fuel supply pipe 24 communicates With the top of the opening 2O and leads to' agasolene supply tank 25, which the chamber 21 and it will flo-w up into and around the cylindrical'recess 22and thereby the pressure upon thev gasolene and the speed of its flow Will be'ret-arded. Then ioo when the gasolene flows through the pas.. sageway 18 into the chamber 14` the opening lIene s'devered closed agaiustairl presj" sure so that when the level of the gasolene within the tank is raised or lowered the level within the chamber 14 will rem ain substantially the same.

Formed within the carbureter chamber l0 is a transversely arranged tube 2G communicating with the discharge passageway 17. This tube has at its central portion an upwardly extended screw threaded tube 27 and a downwardly extended Ascrew threaded tube 28. Extended vertically through these tubes 27 and 2S is the, gasolene disci-large tube 29. This tube 29 is provided with a slot at 30 designed to eonmiunicate with the opening in the tube 26 so that gasolcne may freely flow through the tube 26 into the tube 29 when said latter tube is adjusted vertically to any position out ot' its limit ot movement.

ln order to maintain tight joints around the tube 29, we have provided two stutling boxes 3l and 32 at the ends of the tubes 27 and 28 andsurrounding the tube 29. In the top of the tube 25) is a distributing plug 33 having a small verticall opening and screwed on top of thetube 29 is a cap' 3ft having an opening at itsl top to coincide with the opening in the plug il?. and also having a series otl opening,` Il?) extended vertically through its side edges. .\.t the bottom of the carbureter casing is a support 86 'to which a lever 3T is tuk-ruined. This lever is pivoted at 38 to the lower ond ot the distributing tube 29 so that said distril'mting tube may be raised and lowered wit-hin .the carbureter chamber. By this arrangement it is obvious that it the gasolene is maintained at a normal level within the chamber 14 it will also maintain a similar level within the distributing tube 2S). lt the tube 29 is moved downwardly by the lever 37 then the level. will he near the top of the tube 29 or if said tube 29 is moved upwardly the gasolene level willL be spaced farther apart from the top ot the tube arid in the latter instance the airbeing drawn -through the carburetor chamber will not take up so much gasolene proportionately as in the former instance sothat the device may be adjusted to suit differenti requirements in use by simply manipulating the lever 37.

We have also provided means whereby the relative proportions of gasolene and air dcauf livered by the carbureter may be varied automatically in proportion to the velocity ,ot the air being drawn through the carbureter casing at relatively low speed. The current of air will run relatively close to the gasolene supply and when the air is being drawn through at relatively high speed the greater portion of the air will pass through at a point spaced apart from the gasolene so that the mixture Will be substantially uniform at all times for the reason that in order to take up or vaporize a certain quantity of gasolene air that isAt-raveling through the carbureter at slow speed vit must be discharged closer to the supply ot gasolenel than air that is passing through the carbu# reter at high speed. This result is accomplished as follows: Centrally mounted upon the tube 29 is a lever 39 and pivoted to the ends oi the lever are two links 40 and 41. The link 40 attached at its upper end to a disk which disk is slidingly fitted around the cap fill and its periphery extends from said capoutwardly to a point about midway between the cap 34 and the adjacent interior suritacc ot' the carbureter casing. Fixed to `the upper end of the other link 41 is a second disk 4:3. This disk is large enough in diameter to slidingly tit the interior ot the carbureter casing and at its central portion is a relatively large opening 44 which is larger than the c 'ap 34 and somewhat smaller indiameter than the disk42. These parts are so arranged that when the disks 42 and\ 43 are in the positions shown in Figs. l and 3, very little air will be permitted to pass upwardly through the\ carbureter chamber except through the openings 35 in the cap 34. However when an air suction is applied to the top of a carburetor\chamber it 'will elevate the disk/t3 and when this is done the disk 42 will be correspondingly lowered so that air may pass through between the disks 42 and 43 and up through the opening l-flin the upper disk. When the. disks are relatively close together this current of air will be Jforced inwardly 'toward the center of the distributing tube 29 but when said disks are moved apart to -their maximum limit the air will pass upwardly without beingdischarged so close to the end of the distributing tube. .lt is well known that asthe velocity oit a current of air passing through a carburetor increases the quantity of gasolene that may be'taken up by it will increase proportionatelyg hence `as the veloit-y increases the disks l2 and 43 tend to decrease the proportion ot' gasolene vaporized by the air. `llv this arrangei'nent the proper proportions ot gasolcne and air are maintained lo moet the requirements of use. Furthermore by having the disks 40 and l2 pivotally connected with the tube 2S) they jointly more up and down with said tube to be in proper position relative to the discharge end .ot the tube as it is moved up and down to its proper position relative to the gasolene level within the earlmrcter chamber.`

l'n juactical operation and assuming that the gasolene level within the tube 29 is beine' nniintained by means of the level maintaining devices herein shown and described or hy any other well known device for this purpose, and assui'ning :turtheri that an internal combustion engine is connected to the pipe ll at the top, then as the air is rapidly -noenso drawn' through theifcarbureter chamber7 it will pass through-the openings 35 andfform vternal combustion engine.

ture suitablefor the requirements of an in- If the mixture proves, under the conditions of use at a certain particular time, to betoo rich in gasos lene, then the operator may, by elevating Atube. means for the'handle of the'lever 37 raise the discharge end of the'tube 29 to a point fart-her spaced above the gasolene level or by-low'ering said tube 29 the opposite result may be accomplished. Then the tube 29 is in any position of its movementthe current of air passing through the carbureter chamber will be directed close to the small end of the plug 33 when the velocity is relatively low and it will be directed farther away from the small end of the plug 33 when the velocity of the .air is relatively high so thatan approximately uniform mixture Will be provided under all of the conditions as to air velocity 'usually encountered in practice.

WVe claim as our invention:

l. In a device of the class described, the combination of a carbureter casing, a Vertical distributing tube for liquid fuel, slidably mounted Within the carbureter casing, a horizontal intake tube communicating with the interior of said carbureter casing, said distributing tube being provided with a slot connnunicating with said intake tube, means for vertically adjust-ing said distributing admitting air to the interior of the carbureter casing, and means whereby the liquid in said intake tube may regulating the. amount of air cent to the discharge end of salddistrlbuting `bemaintained at the same level. A

2. In a deviceof the class described, the combination of a carbureter casing, a vertical distributing tube for liquid fuel, slidably lmounted Within the carbureter casing, a

horizontal intake tube communicating With, the interior of said carburtercasing, said distributing tube being provided With a slot communicating with said intake tube, means for vertically adjusting said distributing tube, means for admitting air tothe interior cf the carbureter casing, and meansfor passing adjatube.

Va horizontal 3. In a device of the class described, the combination of a carbureter casing, a vertical distributing tube for liquid fuel, slidably mounted within the carbureter-casing, intake tube communicating with the interior of said carbureter casing,` said distributing' tube'being provided With a slot communicating with said intake tube, means for vertically adjustin said distribating tube, means for admitting air tothe interior or the earbureter casing, and means `for regulating the amount' of air ing combination of a carbureter casing,a Vvertimounted within the carbureter casing, a horizontal intake tube communicating with the interior of said carbureter casing, said distributing tube being provided With'a slot for vertically adju-sting said distributing tube, means for admitting air to the interior of t-he carbureter casing, and means for regulating the amount of air passing adjacent to the discharge end of said distributing tube, said means being automatically operlated lbythe suction from the engin-e, and comprising a plate of approximately the same diameter as the interior of the casing and having a large central opening, said plate being slidably mounted adjacent to the discharge end of thev distributing tube, a second plate slidably mounted on said distributing tube adjacent to said first plate,

said. second plate being of smaller diameter than said first plate but being of suiiicient diameter to close the central opening in said second plate when the plates are together, a lever centrally andpivotally mounted on said distributing tube, a link pivotally con- `.nected with one end of said lever and with one of said plates, a second link pivotally connected with the other endof saidlever and with the other of said plates.

5. In a device of the class describe-d, the combination of a carbureter casing, a vertical distributing tube for liquid fuel, slidably mounted Within the carbureter casing, a horizontal intake tube communicating with the interior of said garbureter casing,. said distributing tube being provided With a slot communicating with said intake tube, means forvadmitting air to the interior of the carbureter casing, means for regulating the amount of air passing adjacent to the discharge end of 'said distributing tube, said means being' automatically operated by the suction from the engine, and comprising a plate vof approximately the same diameter as the interior of the casing and having a large central opening, said plate being slidably mounted adjacent to the discharge end of the distributing tube, a second plate slidably `mounted on said distributing tube adjacent to said first plate, said -second plate being of smaller diameter than said first plate but being of suiiicient diameter to close the central opening in said second plate When the plates rare togethexr, pivotally mounted on said distributing tube, a link pivotally connected with one end of said lever and with adjacent to 'the dischargeend'offsaid qdis-,

'Y by the 'suction-y from" the cal distributing tube-for liquid fuel, slidably.

communicating with said intake tube, means one of said plates, a'

a lever centrally and second link pivotally connected With the other end of said lever and with the other ot sani plates, said first named plate being lotatetl above said second named plate, and a discharge tube leading from the upper end of said earbureter casing.

G. An improved carbureter comprising a carbureter casing with openings for the admission of air, a tranverse tube Within the carbureter Casing, an upright distributing tube slidabliY mounted in said branches and provided with a slot to provide communication between said tubes. stutling,r boxes ou said transverse tube and surrounding the upright tube. a cap atthe top of the upright tube. having an opening` through its center for liquid fuel discharge and also havinga series ot' openings around its sides forming air passageways, means for vertically adjusting the upright tube Within the carbu reter casing, a lever fulcrumed to the up riglit tube,\t\vo links connected With the lever at opposite ends. a disk xed to one of said links and slidingly mounted on said rap. the periphery of said disk being spaced apart from the interior of the casingg-a second disk carried by the other link having a large centralopening spaced apart from the sides of said cap and having its periph ery' close to the interior of the casing. and a throttle valve at the .top of'the casing, substantially as and for the purposes stated.

Des Moines, Iowa, August 12, 1910.

OLIVER I. UNDERIVOOD RAYMOND S. HILL., Iitnesses GEORGE Glnnn'r HACKER, MARY IVALLACE.

Copies ot this patent may be obtained for fitte cents each, by addressing the Commissioner of Patents,I

Washington, D. C. 

